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Beginner

FWSM Default port channel?

I'm doing some L2 cleanups across mutliple 6509E environments and I've found something consistent that I can't find in documentation.

On all my pairs of 6509s where I have FWSMs bundled (6509-A has FWSM-1 is Slot 1 and 6509-B has FWSM-2 in Slot 1) I also have a port channel 305. Obviously when I do a "show run" or "show int desc" I don't see anything in slot one. It's a service module. But the port channel is referencing ports 1/1-6. And it's all in service/up. I was about to delete this as I thought it was some leftover config (TEST 6509s) until I went and saw the same things on our PROD 6509s. Can anyone explain this or provide some documentation on it? Is it cosmetic? Necessary? Can I delete it as part of my audit cleanup? Don't want to mess with it even in TEST without some information. Nothing on google that's clear and I can't find anything on CCO.

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6509-1#sho etherch 305 summ

Flags:  D - down        P - bundled in port-channel

        I - stand-alone s - suspended

        H - Hot-standby (LACP only)

        R - Layer3      S - Layer2

        U - in use      N - not in use, no aggregation

        f - failed to allocate aggregator

        M - not in use, no aggregation due to minimum links not met

        m - not in use, port not aggregated due to minimum links not met

        u - unsuitable for bundling

        d - default port

        w - waiting to be aggregated

Number of channel-groups in use: 11

Number of aggregators:           11

Group  Port-channel  Protocol    Ports

------+-------------+-----------+-----------------------------------------------

305    Po305(SU)        -        Gi1/1(P)       Gi1/2(P)       Gi1/3(P)      

                                 Gi1/4(P)       Gi1/5(P)       Gi1/6(P)      

Last applied Hash Distribution Algorithm:   -

6509-1#sho etherch 305 det 

Group state = L2

Ports: 6   Maxports = 8

Port-channels: 1 Max Port-channels = 1

Protocol:    -

Minimum Links: 0

                Ports in the group:

                -------------------

Port: Gi1/1

------------

Port state    = Up Mstr In-Bndl

Channel group = 305         Mode = On      Gcchange = -

Port-channel  = Po305       GC   =   -         Pseudo port-channel = Po305

Port index    = 0           Load = 0x41        Protocol =    -

Age of the port in the current state: 46d:06h:53m:39s

Port: Gi1/2

------------

Port state    = Up Mstr In-Bndl

Channel group = 305         Mode = On      Gcchange = -

Port-channel  = Po305       GC   =   -         Pseudo port-channel = Po305

Port index    = 1           Load = 0x02        Protocol =    -

Age of the port in the current state: 46d:06h:53m:39s

Port: Gi1/3

------------

Port state    = Up Mstr In-Bndl

Channel group = 305         Mode = On      Gcchange = -

Port-channel  = Po305       GC   =   -         Pseudo port-channel = Po305

Port index    = 2           Load = 0x04        Protocol =    -

Age of the port in the current state: 46d:06h:53m:41s

Port: Gi1/4

------------

Port state    = Up Mstr In-Bndl

Channel group = 305         Mode = On      Gcchange = -

Port-channel  = Po305       GC   =   -         Pseudo port-channel = Po305

Port index    = 3           Load = 0x88        Protocol =    -

Age of the port in the current state: 46d:06h:53m:41s

Port: Gi1/5

------------

Port state    = Up Mstr In-Bndl

Channel group = 305         Mode = On      Gcchange = -

Port-channel  = Po305       GC   =   -         Pseudo port-channel = Po305

Port index    = 4           Load = 0x10        Protocol =    -

Age of the port in the current state: 46d:06h:53m:41s

Port: Gi1/6

------------

Port state    = Up Mstr In-Bndl

Channel group = 305         Mode = On      Gcchange = -

Port-channel  = Po305       GC   =   -         Pseudo port-channel = Po305

Port index    = 5           Load = 0x20        Protocol =    -

Age of the port in the current state: 46d:06h:53m:41s

                Port-channels in the group:

                ----------------------

Port-channel: Po305

------------

Age of the Port-channel   = 46d:06h:55m:56s

Logical slot/port   = 14/11          Number of ports = 6

GC                  = 0x00000000      HotStandBy port = null

Port state          = Port-channel Ag-Inuse

Protocol            =    -

Fast-switchover     = disabled

Load share deferral = disabled  

Ports in the Port-channel:

Index   Load   Port     EC state        No of bits

------+------+------+------------------+-----------

  0     41     Gi1/1    On    2

  1     02     Gi1/2    On    1

  2     04     Gi1/3    On    1

  3     88     Gi1/4    On    2

  4     10     Gi1/5    On    1

  5     20     Gi1/6    On    1

Time since last port bundled:    46d:06h:53m:41s    Gi1/6

Last applied Hash Distribution Algorithm:   -

NOC-SW-ITEST-AGG1#

#################################################################################

2 REPLIES 2
Highlighted
Rising star

The connection between the FWSM and the switch is a 6-GB 802.1Q trunking EtherChannel. This EtherChannel is automatically created when you install the FWSM.

http://cisconetwork.org.ua/1587051893/ch04lev1sec1.html

http://www.cisco.com/en/US/docs/security/fwsm/fwsm23/configuration/guide/switch.pdf

Thanks

Ajay

Highlighted

Hi all,

and if the FWSM has been removed from switch, how can I remove/delete this EtherChannel?

Thanks

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